Bradley woodhull



' 2 Sheets-Sheet 1.

(No Model.)

B. WOODHULL. STOVE AND GRATB.

Patented July 28, 1896.

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2 Sheets-Sl1eet (No Model.)

B. WOODHULL.

STOVE AND GRATE.

No. 564,677. Patented July 28, 1896.

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UNITED STATES PATENT OFFICE. I

BRADLEY WOODHULL, OF'SGBANTON, PENNSYLVANIA, ASSIGNOR TO THE SCRANTONSTOVE WORKS, SAME PLACE.

sTovE AND GRATE.

SPECIFICATION forming part-of Letters Patent No.'564,67'7,, dated July28, 1896.

Application filed February 19, 1896. Serial No. 579,945. (No model.)

To all whom it may. concern.-

Be it known that I, BRADLEY WoonHULL, of Scranton, in the county ofLackawanna, State of Pennsylvania, have invented certain new and usefulImprovements in Stoves and Grates and I do hereby declare the followingto be a full, clear, and exact description of the same, reference beinghad to the accompanying drawings, forming a part of this specification,and to the letters of reference marked thereon.

This invention relates to improvements in fire-boxes and grates, such asare designed for heating furnaces, stoves, &c., the invention relatingmore particularly, though not exclusively, to that class of gratesemploying gratesections, which rotate or oscillate on their longitudinalcenters, so as to discharge clinkers, unburned portions of the fuel, andashes with out requiring the same to pass through the interstices of thegrate itself.

The invention consists in certain novel details of construction andcombinations and arrangements of parts, all as will be now described,and pointed out particularly in the appended claims.

In the accompanying drawings, Figure 1 is a perspective view of afire-box and grate constructed in accordance with my invention, thefire-brick section and grate-frame being shown separated from thefire-box proper and a portion of the wall of the fire-box broken away toshow the internal arrangement of the parts. Figs. 2 and 3 are detailtransverse sectional views looking toward opposite ends of the fire-pot.Fig. 4 is a longitudinal section.

Fig. 5 is a detail section taken longitudinally through the center ofone of the grate-bars. Fig. 6 is a detail end elevation with the endplate removed in order to illustrate the manner of removing thegrate-bars without disturbing the other portions of the setting, thefront plate being shown at one side in perspective.

I Like letters of reference in the several figures indicate the sameparts.

Thefire-box itself, lettered A in the accompanying drawings, may be ofany desired or preferred pattern, and may be in part or whole formed bythe walls of the stove or furnace in which it is desired to employ mypresent invention, and hence, while I have shown a simple rectangularfire-box, it will be understood that such shape is shown as a mat-' terof convenience only.

On the inner side of the fire-box, atapproximately the level of thegrate-bars, I provide bearing ribs or brackets a, which are adapted tosupport the edges of the grateframe B. This grate-frame B is preferablyformed in solid halves, which have interlocking projections 19 on theirmeeting-arms, so as to hold the frame in its proper form, and at thepoints of meeting I provide supplemental supporting-brackets C O,projecting the one, C, from the rear end of the fire-box and the other,C, projecting from the front end of the fire-box.

The bracket C has its base connected with the fire-box at a point belowthe front plate opening, and said base at C is extended to form a shieldor guard outside of which the gear-wheels for rotating thegrate-sections are located, as will be presently explained.

The bracket 0, preferably, is cast integral with and forms a part of theend plate of the firebox, and on each side of this bracket this endplate is provided with a bridge-bearing plate D, in which the bearingsfor the journals d at the rear ends of the grate bars E are formed.These bridge-bearing plates, it will thus be seen, stand away from theend plate of the fire-box and consequently there is a circulation of airaround them to prevent them from burning out, and there can be noaccumulations of ashes or dust to prevent such circulation, any ashes ordust getting behind the bridge-bearing plates at once dropping throughinto the ash-pit.

At the front end of the fire-box the gratebars E are provided with theusual interrneshing gear-wheels c, said gear-wheels e lying outside ofthe bottom of the bracket 0 and end of the grate-frame, and beyond thegearwheels the grate-bars are provided with journals which take intobearings F in a bridge plate F formed or attached to the inner side I ofthe removable front plate G. One of these jounals extends away throughthe front plate G and is adapted for the reception of a handle or crank,by means of which the grates are oscillated or rotated to dump or shakethe fire, and both the bearings on the face-plate G are formed in abridge-plate, which stands away from the face-plate at the bottom topermit of a free circulation of air around the parts as well as toprevent the accumulation of ashes or dust in the bearings. Thisbridge-plate F may be cast separate from the face-plate and attachedthereto by rivets or otherwise, if so desired, although I prefer to haveit form a permanent portion of said face-plate.

Such construction, it will be seen, permits of the ready and convenientremoval of the grate-bars without disturbing the grate-frame or firerboxotherwise than to simply remove the face or end plate G and draw thegratebars out at that end of the fire-box. Consequently it is entirelypractical to arrange the usual water fronts or backs or their linings inthe fire-box above the grate-frame, and while I have illustrated hereina simple rectangular fire-brick frame G which rests on and is supportedby the grateframe, it will be understood that this section of fire-brickmay be in part or whole displaced by a water fire back or front, andthat the same may constitute a permanent part of the setting. I preferthat the fire-brick section should have a flange g seating outside ofthe flange g on the grateframe, while the inner face of the fire-brickoverhangs the central opening in said frame, in order to prevent theburning out of the frame or the accumulations of ashes or dust therein.

As a convenient means for holding the front or end plate in position, Imay employ bolts H, having countersunk heads or turn-buttons h, or anyother approved form of fastening device which will permit of said platebeing removed at will to allow of the removal or repair of thegrate-bars.

The grate-bars themselves are of an ordinary pattern now on the market,and I do not deem a particular description of the same necessary ordesirable, inasmuch as I do not desire to be limited to any particularstyle of grate-ban For convenience in casting the rear end of thefire-box with" the bridge-plate bearings thereon, I may form a separatecentral section I in said end, which section may be secured in place byrivets or otherwise prior to the setting up of the fire-box, thusforming a closed end to the fire-box when this is desired.

Having thus described my invention, what I claim as new is l. Thecombination with the fire-box having the opening in one end, and theinwardlyprojecting brackets rigidly connected with said fire-box, one ofsaid brackets extending up in line with the opening, of the grate-framesupported on said brackets, a removable section closing the opening inthe fire-box and the grate supported in bearings beneath the grateframeand in position to be withdrawn through the opening in the fire-boxwithout disturbing the grate-frame or the fire-box lining overlying thegrate-frame; substantially as described. 7

2. The combination with the fire-box having the opening in one endthereof and the brackets rigidly connected with said fire-box at theends and projecting inwardly, of the grate-frame supported on saidbrackets, the pivoted gratesections mounted in bearings in the fire-box,intermeshing gears connecting said grate-sections located outside of thebracket at the end of the fire-box adjacent the opening and a removablesection for closing said opening; substantially as described.

3. The combination with the fire-box having the grate-frame-supportingribs on its front and rear and the inwardly-projecting brackets atopposite ends, of the sectional grateframe supported by said ribs andbrackets; the fire-box lining overlying the grate-frame and thesectional grate supported in bearings below the grate-frame on oppositesides of the brackets; substantially as described.

4. The combination with the fire-box having the inwardly-proj ectinggrate-frame-supporting bracket formed with the wide base, and thegrate-frame supported bysaid bracket, of the oscillatory grate formed ofgrate-bars located at opposite sides of the bracket and havingintermeshing cog-wheels, said cog-wheels lying outside of the wide baseof the supporting-bracket for the grate-frame substantially asdescribed. 5. The combin ationwith the fire-box having the inwardly-projecting grate-frame-supporting bracket provided with a relatively widebase and the grate-frame supported by said bracket, of the oscillatorygrate-bars, co wheels located thereon and lying outside of the base ofthe bracket, and a removable section in the fire-box having the journalsfor the ends of the grate-bars located outside of thegrate-frame-supporting bracket, whereby said section may be removed andthe gratebars withdrawn without disturbing the grateframe and fire-boxlining; substantially as described.

' 6. In a setting, such as described, the combination with theoscillatory grate, of the firebox having the bearing bridgeplates formedthereon within the'wall of the fire-pot and having openings at top andbottom for the circulation of air around the journals of the grate;substantially as described.

7. The combination with the fire-box having the bridge-plate on itsinner side with openings at top and bottom of the same for thecirculation of air between said bridge-plate and wall of the fire-boxand bearings formed in said bridge-plate, of the oscillatory gratebarshaving journals working in said bearings, the grate-frame and thefire-box lining lying within said bridge-plate; substantially asdescribed.

. anvil 8. The eombinationwith the fire-boxhaving formed in saidbridge-plate; substantially as the bearings for the oscfllatorygrate-bars described. formed in one end thereof, of the removablesection for closing the opposite end of said BRADLEY WOODHULL' 5fire-box having the bridge-plate on its inner WVitnesses: side With anair-space behind the same and JOHN TAYLOR,

bearings for the outer ends of the grate-bars J. A. LANSING.

